Rank	Countries/Territories	Count	Percent
1	United States	507	46.6%
2	China	233	21.4%
3	Germany	108	9.9%
4	Japan	30	2.8%
5	Taiwan	29	2.7%
6	Netherlands	23	2.1%
7	Ukraine	20	1.8%
8	Canada	17	1.6%
9	Ireland	16	1.5%
10	France	12	1.1%
11	India	11	1%
12	Korea, Republic of	9	0.8%
13	Singapore	9	0.8%
14	Italy	8	0.7%
15	Bulgaria	7	0.6%
16	South Africa	6	0.6%
17	United Kingdom	6	0.6%
18	Romania	5	0.5%
19	Russia	4	0.4%
20	Norway	4	0.4%
21	Australia	3	0.3%
22	Cyprus	3	0.3%
23	Argentina	2	0.2%
24	Oman	2	0.2%
25	Israel	2	0.2%
26	Poland	2	0.2%
27	Thailand	2	0.2%
28	Turkey	2	0.2%
29	Spain	1	0.1%
30	Palestine, State of	1	0.1%
31	Philippines	1	0.1%
32	Belgium	1	0.1%
33	Brazil	1	0.1%